Oral irrigator



FIG. 1 is a front, top perspective view of an oral irrigator showing my new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the oral irrigator, which form no parts of the claimed design. 

CLAIM The ornamental design for an oral irrigator, as shown and described. 